3 8 0 D O C U M E N T S 3 9 3 , 3 9 4 O C T O B E R 1 9 2 6 393. To Hermann Anschütz-Kaempfe [Berlin,] 23 October 1926 Dear Mr. Anschütz, I thank your wife kindly for the book and her kind note. It was very nice in Kiel and, most of all, I am pleased to have seen you again.[1] It is all of no avail in regard to Albert. Not even Bleuler left any lasting impressions.[2] How is the transmission doing?[3] I believe that this method will be very good, if it is properly implemented. I enclose herewith a letter from Langevin.[4] This is my French colleague who demonstrated how to produce short-wave directed acoustic radiation by means of electrically excited mechanical transverse vibrations of a quartz plate. [5] el. [6] mech. [7] quartz [8] directed water sound waves Reply to him (Collège de France) or write me what I should respond to him. I am overburdened with work. Therefore the brevity. Warm regards, your A. Einstein P.S. I send along a letter by a certain Archenhold [9] it is up to you whether or not you would like to supply him with an article. The man is a great—but not inept— “busybody.”[10] 394. To Friedrich S. Archenhold[1] [Berlin,] 23 October 1926 Dear Mr. Archenhold, Your idea to arrange a Mars exhibit at your observatory is good.[2] In general in- defatigable people like yourself are enjoyable. However, I cannot but wonder how the Paris Institute[3] will be involved in this exhibit, and in which sense I should [5] [6] [7] [8]